无裂痕的

If the steel is not killed with aluminum .the Nitrogen content shall not exceed 0.008. warm rolling steel bands for pipes shall be without defects such as foliation inner blisters, nickel fractures cracks or any other defects which can cause break-down corrosion or porosity of pipe walls. the plate or skelp used for PSL 2 pipe shall not contain any repair welds.

如果钢管不是因为铝化断开的话，其实含氮量不应该超过0.008，用于钢管的热轧钢板应无任何如内部水泡面理、镍断口裂痕及其它可引起腐蚀或使管壁多孔化的瑕疵，用于生产 PSL2钢管的金属板或焊接管坯钢不应含有任何修补焊接的痕迹。

In wastes time in the years, always one red impression reappears in the heart, fissure in above vague....

在蹉跎的岁月里，总有一种红色的印象在心中浮现，条条裂痕在上面若有若无。。。。

Second we must try first hand the desirability of a wire bent repeatedly any soft anti-fatigue and plastic or rubber flexible handle and wire insulation is no cracks in high-class product.

二要试，可取一根电线头用手反复弯曲，凡是手感柔软、抗疲捞强度好、塑料或橡胶手感弹性大且电线绝缘体上无裂痕的就是优等品。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。